- now the DynamicResolutionOptions don't specify the target frame rate,
they only specify how to scale this given view
- there is a new FrameRateOptions setting on Renderer, which is used
to specify the desired target frame rate for the whole Renderer
- the frame rate is now specified as a "frame interval" in units of
the display frame period.
- the display frame period is (indirectly) set via DisplayInfo.
In other words, the use must set (and update) DisplayInfo properly
(the default are reasonable, but assume 60 Hz). They must also set the
desired interval (default is 1, which is probably what you want).
Finally they must enable dynamic scaling per View, the defaults are
also reasonable.
Currently Renderer doesn't attempt (yet) to actually target the
requested frame rate, so it's up to the caller to push frames at the
desired speed. however, dynamic resolution, like before, will attempt
to shrink work to fit the target.
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